9918612 has 120 divisors (see below), whose sum is σ = 29760192. Its totient is φ = 2874960.

The previous prime is 9918611. The next prime is 9918617. The reversal of 9918612 is 2168199.

It is a Harshad number since it is a multiple of its sum of digits (36).

Its product of digits (7776) is a multiple of the sum of its prime factors (72).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9918611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 431233 + ... + 431255.

Almost surely, 2^9918612 is an apocalyptic number.

9918612 is a gapful number since it is divisible by the number (92) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9918612, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14880096).

9918612 is an abundant number, since it is smaller than the sum of its proper divisors (19841580).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

9918612 is a wasteful number, since it uses less digits than its factorization.

9918612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72 (or 39 counting only the distinct ones).

The product of its digits is 7776, while the sum is 36.

The square root of 9918612 is about 3149.3827966762. The cubic root of 9918612 is about 214.8573923604.

The spelling of 9918612 in words is "nine million, nine hundred eighteen thousand, six hundred twelve".